/Engine/Plugins/Runtime/MeshModelingToolset/Source/ModelingComponents/Public/BaseTools/BaseCreateFromSelectedTool.h
Return the materials to be used on the output mesh on tool accept; defaults to the materials set on the preview
virtual [TArray](API\Runtime\Core\Containers\TArray)< [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) * > GetOutputMaterials() const